Luminaire



Jan. 3, 1961 A. K. GOETZ ET AL LUMINAIRE} 4 Sheets-Sheet 1 Filed Sept. 28, 1955 INVENTORS Alfred K. Goetz a ggwurd I Beuqh.

WITNESSES ATTORNEY Jan. 3, 1961 A. K. GQETZ ETA]. 2,967,230

LUMINAIRE Filed Sept. 28, 1955 4 Sheets-Sheet 2 Fig.2.

Jan. 3, 1961 A. K. GOETZ ET AI. 2,967,230

LUMINAIRE Filed Sept. 28, 1955 4 Sheets-Sheet 5 LUMINAIRE Filed Sept. 28, 1955 4 Sheets-Sheet 4 Fig. 5.

nited Sttes Patent LUMIN r Filed Sept. 28, 1955, Ser. No. 537,120

9 Claims. (Cl. 240-3) Our invention relates generally to luminaires and, more particularly, to outdoor floodlighting luminaires which may be pivotally rotated to obtain fioodlighting of particular areas.

As can readily be appreciated, in outdoor floodlighting it is highly desirable that the luminaires for such purposes be constructed so as to be readily installed, maintained and adjusted to illuminate various areas in order to reduce the initial and operating cost of the luminaire. I-leretofo-re, some prior luminaires of a similar nature have provided means for both maintaining and adjusting the luminaire, however, they have been constructed so as to require a variety of standard tools to accomplish these purposes. As such luminaires are elevated above the area to be illuminated, the use of a number of tools for such purposes is unsatisfactory due to the inconvenience of using them at elevated heights. Still other prior luminaires which have had simplified components have required the various parts to be completely disassembled for maintenance purposes which also cannot be conveniently accomplished at elevated heights. It is also desirable that the luminaires should be pivotally mounted to illuminate various areas, however, such mounting should be such that the luminaire cannot be moved in a manner so as to cause damage to the electrical supply lines to the luminaire. Some prior devices which have been adjustable have not provided means whereby pivotal rotation of the luminaire may be accomplished, while still other prior luminaires which have means for pivotally supporting the luminaire have required relatively expensive and complex mechanisms for limiting the movement of the luminaire.

Accordingly, one object of our invention is to provide a new and improved luminaire of the type which is supported above the ground which may readily be serviced in the field.

Another object of our invention is to provide a new and improved pivotally supported luminaire of the type which is supported above the ground which has concealed stops to limit the total rotation of the luminaire in either direction about its pivot axis.

Still another object of our invention is to provide a new and improved luminaire of the type which is supported above the ground having an upper reflector and a lower lens which has a simplified hinge construction, so that the upper reflector may be supported at an open position with respect to a lower lens or so that the reflector and the lens may be entirely separated from each other.

A more specific object of our invention is to provide a new and improved pivotally supported luminaire of the type which is supported above the ground which has a clamping arrangement for supporting the luminaire about a pivot axis, which clamping arrangement may be released and resecured by moving recessed screws.

A more specific object of our invention is to provide a new and improved pivotally supported luminaire of the type which is supportedabove the ground and which ice has a clamping arrangement for supporting the luminaire about a pivot axis, which clamping arrangement may be released and resecured by moving recessed screws, and which clamping arrangement also functions as a stop to limit the pivotal rotation of the luminaire in either direction.

A more specific object of our invention is to provide a new and improved pivotally supported luminaire of the type which is supported above the ground, which has a pivotally supported arm having a pin projecting therefrom which is located and movable within a slot in a plate tolimit rotational movement of the luminaire about its pivotal axis.

Still another object of our invention is to provide a new and improved luminaire of a type which is supported above the ground having a hinge for supporting a reflector thereof in operative relation with a lens thereof, which does not require a hinge pin.

A more specific object of our invention is to provide a new and improved luminaire of the type which is supported above the ground, having a hinge for supporting a reflector thereof in operative relation with a lens thereof which comprises a pair of arcuately-shaped cooperating members secured to the reflector and the lens support, respectively.

These and other objects of our invention will become more apparent upon consideration of the following detailed description of luminaires constructed in accordance with the principles of our invention when taken in conjunction with the attached drawings, in which:

Figure 1 is a front elevational view of a luminaire constructed in accordance with the principles of our invention and the support therefor, having parts thereof shown in section;

Fig. 2 is a front elevational view of another form of luminaire constructed in accordance with the principles of our invention and the support therefor, having parts thereof shown in section;

Fig. 3 is a side elevational view of the like portions of the luminaires as shown in Figs. 1 and 2, showing the reflector in an open position with respect to the lens ring;

Fig. 4 is a top plan view of the like portions of the luminaires as shown in Figs. 1 and 2;

Fig. 5 is an enlarged cross-sectional view of a portion of a support arm, reflector, and lens ring for the Inminaires as shown in Figs. 1 and 2, taken substantially along the line VV of Fig. 6;

Fig. 6 is an enlarged partial front elevation and partial sectional view of a support arm, lens ring and reflector of the luminaires as shown in Figs. 1 and 2, taken substantially along the line VIVI- of Fig. 4;

Fig. 7 is an enlarged sectional view of the hinge portion of the luminaires as shown in Figs. 1 and 2, taken substantially along the line VII-VII of Fig. 4;

Fig. 8 is an enlarged sectional view of the front portion of the luminaires, as shown in Figs. 1 and 2, taken substantially along the line VIII-VIII of Fig. 4;

Fig. 9 is a perspective view of the holder and a portion of the hanger of the hinge for the luminaires as shown in Figs. 1 and 2;

Fig. 10 is an enlarged cross-sectional view of the lens ring for the luminaires shown in Figs. 1 and 2 taken substantially along the line XX of Fig. 4; and

Fig. 11 is a front elevational view of the index plate utilized in the luminaire shown in Fig. 2.

Referring to Figs. 1, 3 and 4 of the drawings, it will be noted that a luminaire constructed in accordance with the principles of our invention comprises a Y-shaped yoke which is formed from a pair of hollow arcuatelyshaped support arms 2 which are provided with a suitable mating structure at their lower ends so that they may be assembled together so as to be externally flush with each other. As shown, the lower portion of each arm 2 is laterally enlarged to form a half circular chamber which, when arms 2 are secured together, forms a downwardly open circular chamber 4. Arms 2 may be secured together by any suitable means such as by means of bolts 6 extending through openings in integral butting flanges formed on each of the arms 2 within chamber 4. A vertically extending cylindrical tank assembly 8 is provided which has its upper end located within and in engagement with the chamber 4, and which has its lower end located in engagement with the outer surface of the upper portion of a hollow fitting it). The respective ends of the tank assembly 8 may be secured to arms 2 and fitting 16 in any suitable manner, such as by bolts, not shown, extending through openings in the sides of chamber 4, fitting l and the end portions of the tank assembly 8 located inwardly thereof. Fitting It may be of any desired hollow shape so as to receive the upper end of a vertically extending support pipe, not shown, and may be secured thereto by any suitable means well known in the art, such as by a set screw 12 extending through a threaded opening therein and engaging the support pipe. A control transformer 14 for electrically controlling a lamp 16, hereinafter discussed, is supported within tank assembly 8 in any suitable manner, not shown, and sufficient clearance is provided therebetween so that secondary supply conductors 18 may extend vertically along the inner surface of tank assembly 8 and so that electrical connections may be made therein to line supply conductors, not shown, extending upwardly through the support pipe and the fitting it into tank assembly 8. Each of the arms 2, tank assembly 8 and fitting It may be fabricated from any suitable material having SllfllCleIlt structural strength to support the reflector and lens assembly as hereinafter described, and in view of the light weight and corrosion resistingproperties of aluminum alloy, uch is preferred therefor.

In order to provide a pivot support for the reflector and lens assembly hereinafter described, the outer end of each arm 2 is provided with a horizontally inwardly extending hollow circular pivot pin 2t), with these pins being in horizontal alignment with each other so as to form a pivot axis. A circular lens ring 24 is located etween the arms 2 of the yoke and it is provided with diametrically opposed circular pivot recesses 22 which are of a size to rotatably receive pins 20 therein. Although only one pin 26 is shown in Fig. 6, the inner end of the other pin 20 is adapted to be seated in an opposed circular recess 22 in the lens ring 24 in the same manner. Lens ring 24 is irregular in cross section and the section var es at spaced locations in order to accomplish several different functions, as hereinafter described. A circular inverted dish-shaped reflector 26, which may be fabricated from any suitable material having sufficient structural strength such as an aluminum alloy, and which.

may be provided with a suitable inner reflecting surface, such as porcelain enamel, is pivotally secured to the lens ring 24 by means of a hinge, described hereinafter, which is located at a point on the reflector 26 which is spaced 90 from each of the arms 2. A circular dishshaped lens 32 of any suitable light transmitting material, such as glass, is also secured to the lens ring 24, as hereinafter described, so that the structure comprising lens ring 24, lens 32 and reflector 26 may be pivotally rotated as a unitary structure about pivot pins 20.

The cross section of lens ring 24, except for spaced differentlv shaped portions hereinafter described, comprises (Fig. an elongatedvertically extending side wall 34 having a rectangular flange 36 extending substantially perpendicularly outwardly therefrom at the outer side of side wall 34 at its lower end, with the lower surface of side wall 34 and projection 36 forming a single plane surface 35. At the inner side of wall as, there is provided an inwardly extending projection 39 having an inwardly and downwardly sloping upper surface which is joined to Wall 34 at a point spaced upwardly from the upper surface of flange 36 and below the center of wall 34, with its free end extending to a point below surface 35 of side wall 34 and flange 36 as part of an inwardly and downwardly sloping projection 35 As shown in Fig. 7, the cross section of lens ring 24 through the center of the hinge for supporting reflector 26 is similar to the cross section shown in Fig. 10, except that a boss at has been provided on the inner side of the side wall 34. As shown, the upper surface of boss 4d extends horizontally above the lower surface 35 and its inner side extends vertically approximately in alignment with the inner end of the surface 35. In order to enlarge the upper surface of boss 40, the upper inner side of side wall 34 is provided with a recess 42 which extends vertically downward from the upper surface of side wall 34.

As shown, the upper surface of projection 39 is for the purpose of supporting the lens 32 within lens ring 24. Accordingl, lens 32 is of a diameter so that its free edge can seat on the upper surface of projection 39. In order to support the free edge of lens 32 at all points, projection 39 extends inwardly from lens rings 24 around its entire inner periphery, however, if desired circumferentially spaced projections similar in contour to projections 39 could be used. In order to provide a weathertight seal around lens 32 and to prevent the entrance of dirt within the assembled luminaire, a gasket 44 is located between the upper surface of projection 39 and the lower surface of the free edge of lens 32 which gasket is annular in form and has its inner edge approximately flush with the inner end of the projection 39. Lens 32 is of a diameter so as to be insertable within the circular opening formed by the wall 34 so that the area adjacent its free edge on its outer surface engages the upper surface of gasket 44 and so that the free edge thereof is approximately flush with the upper edge of the gasket 44. Gasket 44 is formed of any suitable weatherresisting material, such as treated asbestos and, if desired, may be permanently secured to the upper surface of projection 39 by any suitable securing means, such as by being cemented thereto.

Lens 32 is secured to projection 39 by means of spring clips 46 which are formed of any suitable resilient material such as steel having sufficient rigidity to force the outer edge of lens 32 into engagement with the gasket 44. As shown, spring clips 46 each comprise a fiat portion 48 which engages the upper surface of a boss 40 and which is secured thereto in any suitable manner, such as by means of machine screws 5% extending through openings therein and engaging threaded openings 52 (Fig. 8) in each boss 40. Spring clips 46 are also provided with an arm portion 54 which extends angularly downwardly and inwardly toward the free edge of lens 32 so that their free end is in engagement therewith to force the lens 32 against the gasket 44. If desired, the free ends of arm portions 54 of springs 46 may be provided with a curved portion 56 so as to provide a better contact with the inner surface of the free edge of lens 32. It is believed obvious that a plurality of bosses 4% may beprovided at spaced intervals around the inner surface of lens ring 24 to insure that sufficient spring clips 46 are provided to firmly secure the lens 32 into engagement with the lens ring 24.

As also shown in Fig. 7, reflector 26 is provided with a flat outwardly extending circular flange portion 60 around the periphery thereof which terminates at its outer edge with a vertically downwardly extending'circular flange portion 62. Flange portion 6i} and the dishshaped portion of reflector 26 are formed so that the upper portion of the side wall 34 of lens ring 24 engages the lower surface of flange portion 60 so as to support the reflector 26 around its entire periphery. Flange portion 62 of reflector 26 is spaced slightly outward from the outer edge of lens ring 24 and has its lower free edge located slightly vertically upwardly from the lower surface 35 of lens ring 24 so as to provide the luminaire with a symmetrical external appearance and for enclosing the lens ring 24. In order to provide a weather and dirt seal between the lower surface of flange portion 60 of reflector 26 and the lens ring 24, the upper surface of side wall 34 of lens ring 24 is provided with a suitable annular gasket 64 similarly secured thereto and of a material similar to gasket 44 previously described.

K's previously indicated, reflector 26 is pivotally secured to the lens ring 24 by means of a hinge which, as shown in Figs. 7 and 9, is of the pinless. type and comprises a unique one-piece hanger 66 and a separate onepiece holder 68. Hanger 66 and holder 68 may be made from any suitable material having suflicient structural strength and for the reasons as previously indicated they are preferably fabricated from steel suitably protected for corrosion resistance. Hanger 66 comprises an elongated half-circular pin segment 70, one arm of which is extended upwardly to form an elongated plate 72 which is laterally arcuate in form so that it may be closely received against the outer surface of flange portion 62 and be secured thereto by any suitable means such as a bolt 74 extending through aligned openings in plate 72 and flange portion 62. It will be noted that the area above the lens ring flange 36 and outwardly of the side wall 34 of lens ring 24 is suflicient to provide clearance for receiving the inner end of the bolt 74. Plate 72 is secured to flange portion 62 so that the upper edge of the outer arm of pin segment 70 is located approximately in horizontal alignment with the lower surface 35 of the lens ring 24.

Holder 68 of the hinge comprises a generally rectangular flat plate 76 which is secured to the horizontally extending surface 35 of lens ring 24 in any suitable manner, such as by machine screws 50 extending through openings 51, only one of which is shown, therein and engaging vertically extending threaded openings, not shown, in the side wall 34 of lens ring 24. Plate 76 is secured to lens ring 24 so that a portion thereof extends outwardly beyond the flange portion 62 of reflector 26. In order to provide clearance for projection 39 of lens ring 24, the inner edge of plate 76 is arcuate in form to substantially conform to the curvature of lens ring 24. As shown, the portion of plate 76 located outwardly of flange 62 of reflector 26 is provided with an intermediate elongated part circular support segment 78 which extends approximately tangential to the outer segment of flange 62 with its inner curvature facing upwardly. In order that seg ments 70 and 78 may function as a hinge, the inner curvature of support segment 78 of holder 68 is such so as to closely receive therein the outer curvature of the pin segment 70 of the hanger 66.

In accordance with the principle of our invention, support segment 78 terminates inwardly from each side of plate 76, and pin segment 70 is of a greater length than its cooperable support segment 78. In order to provide holder 68 with means for preventing removal of hanger 66 from holder 68 by being lifted upwardly, plate 76 is provided with an outwardly extending projection 80 at each end of segment 78 which is spaced from segment 78. In order to facilitate forming segment 78 a notch 82 is provided in plate 78 which extends inwardly thereof between each projection 80 and the adjacent end of segment 78. In order to permit the outer arm of segment 70 to engage segment 78, each projection 80 is provided with a rectangular open ended notch 84 which extends laterally from the opening between each projection 80 and segment 78, and which notches 84 have their bottom edges laterally spaced a distance to closely receive segment 70 therebetween. Notches 84 are also located outwardly from the inner edge of plate 76 a distance so that the inner long arm of segment 70 extends vertically the reflector 26.

therethrough when the reflector 26 is located on the lens ring 24 as described, and are spaced a distance from the outer edge of plate 76 so that laterally extending tabs 86 are formed at the outer edge of each projection 80. It will also be noted that the outer edge of each projection 80 is located approximately centrally of segment 78 and inwardly of the outer arm of the pin segment 70.

Once the hanger 66 and holder 68 have been properly secured to the reflector 26 and the lens ring 24, respectively, as indicated, the reflector 26 may readily be pivotally located with respect to the lens ring 24 by initially aligning the outer arm of pin segment 70 with the opposed notches 84 and thereafter rotating reflector 26 in a clockwise direction (with reference to Fig. 7) so that the outer arm of segment 70 enters the opposed notches 84 and its outer surface engages the inner surface of segment 78 of the holder 68. During such insertion of the outer arm of segment 70 in the opposed notches 84, it will be noted that the tabs 86 serve as a guide to insure the proper insertion of the outer arm of segment 70 over the inner surface of segment 78 until the upper surface of gasket 64 on the upper surface of side Wall 34 of lens ring 24 engages the lower surface of flange portion 60 of reflector 26. As notches 84 are spaced a distance slightly greater than the lateral width of hanger 66, lateral movement of hanger 66 within notches 84 is thereby limited. When the reflector 26 has been so located, the outer surface of plate 72 of hanger 66 engages the inner edges of the tabs 86 so as to prevent the reflector 26 from being moved horizontally. Also, if desired, in order to facilitate the insertion of pin segment 70 within notches 84, a rectangular projection 88, only one of which is shown, may be provided at each side of the outer arm of pin segment 70, which extends upwardly therefrom at the closed position. Tabs 86 also are engageable with the inner curved surface of pin segment 70 to prevent the hinged end of reflector 26 from being lifted upwardly;

With such a construction, the hanger 66 may be rotated counterclockwise through a relatively large angle relative to the holder 68 before the pin segment 70 can be disengaged from the support segment 78, whereby hanger 66 and holder 68 will function as a hinge. Although reflector 26, which is secured to hanger 66, may be held open at a number of angular positions relative to the lens ring 24, it may be desirable that some means he provided for retaining the reflector 26 at least at one fixed position relative to lens-ring 24 in order to facilitate servicing of the assembled luminaire. Thus, as shown in Fig. 3, reflector 26 may readily be moved counterclockwise so as to be located approximately 40 degrees above the lens ring 24 so that the lamp 16 and the inner surfaces of reflector 26 and lens 32 may be serviced without requiring the reflector 26 to 'be removed from the lens ring 24. In order to retain reflector 26 at this open position, an elongated support 90 of any suitable flexible material, such as spring steel, has been provided which may be moved to extend upwardly from lens ring 24 at a point approximately diametrically opposite from the center of the hinge and which engages the flange portion 60 of reflector 26. Referring also to Fig. 1, it will be noted that one end of support 90 is pivotally supported on lens ring 24 at such point by any suitable securing means such as a machine screw 50 extending through an opening therein and threadedly engaging an opening (not shown) in the lens ring 24 which extends horizontally inwardly of the side wall 34 above the flange 36. When the reflector 26 is in the, closed position as shown in Fig. 1, support 90 extends arcuately around the outer surface of side wall 34 of lens ring 24 with its lower edge supported by the upper surface of flange 36, so that the sup port 90 is enclosed by the flange portions 60 and 62 of In order to prevent the free end of support 90 from extending outwardly from ring 24 to prevent the reflector 26 from being closed, a projection 92 is provided which extends upwardly from flange 36 and is spaced outwardly from the outer surface ofside wall.34 of lens ring 24-adjacent the free end of support 90 so as to receive the support 90 therebetween. Support 9t! is provided at its free end with a central elongated projection 94 which extends outwardly therefromsoasto form a shoulder at each side thereof. Referring to Fig. 8, it will be noted that flange portion 60 is provided with an opening 96 which is diametrically opposed from the center of the hinge and which, when reflector 26 is raised, as illustrated in Fig. 3, is located upwardly from lens ring 24 so as to receive projection 94 therein. Thus, during servicing of the assembled luminaire, the reflector 26 is initially elevated with one hand to an open position and the support 90 grasped with the other hand and rotated about its pivotally supported endso that it extends approximately perpendicularly upwardly from the lens ring 24. The upper free end of support 96 is bent inwardly below the flange portion 60 of reflector 26, and thereafter the reflector 26 is lowered so that the projection 94 on support 9t) enters the opening 96 in flange 6t and the shoulders at each side of projection 94 engage the lower surface of the flange 60 adjacent each side of opening 96, and the reflector 26 is supported thereby in the open position. If desired, the free end of projection 94 may be turned outwardly as shown to extend outwardly over the upper surface of flange 69 to prevent the reflector from being accidentally moved upwardly and disengaging projection 9%. After theservicing has been completed, reflector 26 may be elevated so that the projection 94 clears the opening 96 and thereafter the support 9-9 is rotated so as to be retained as indicated behind projection 92 so that the reflector 26 may be closed as indicated.

Referring to Fig. 8, it will be noted that the cross section of lensring 2 5 diametrically opposite from the hinge is similar to that shown in Fig. 7-, except that side wall 34 has been enlarged outwardly so as to provide a boss @8 at its outer side rather than a flange 36. Boss 98 extends to the upper edge of side wall 3d and its outer side extends vertically in substantially the same plane as the outer edge of flange 36, so that the outer diameter of lens ring 24 remains unchanged. As shown, boss 98 is provided with a vertically extending threaded opening 1% therein which is in alignment with the opening 96 in the flange portion 69 when the reflector 26 is in the closed position so that the reflector 26 may be permanently secured to the lens ring 24 in any suitable manner, such as by machine screw 5t extending through opening 96 and engaging the threaded opening 1%. Thus, it will be noted that the machine screw St? in engagement with the boss 93 and the projections 86 on the holder 63 prevent the reflector 26 from being moved upwardly away from the lens ring 24 when the luminaire is assembled. lt is obvious, of course, that machine screw 56 in boss 98 may easily be removed by means of a screw driver to permit the reflector 26 to be elevated. Inasmuch as the boss 98 is located diametrically opposite the center of the hinge, it is obvious that the pivot point for the support 9% cannot be located in the boss 9%, and accordingly, it is offset to one side of boss 93 as shown in Fi 1.

ileferring to Figs. 5 and 6, it will be noted that the cross section of lens ring 24 where it is engaged by the arm 2 of the yoke has been changed substantially from the cross sections thereof previously described. Such cross section comprises a straight side wall 5 which is integral with side wall 34. Although only one arm 2 and one side wall 5 is shown in Fig. 6, it is to be realized that their cooperating structure as herein described is identical, and accordingly both arms 2 and side walls 5 need not be shown. Each side wall 5 has an inner surface extending vertically upwardly from the outer end of upper surface of: projection 32 and is provided with the pivot recess 22, previously discussed, which ex- I reflector 26 and the lens 32.

tends inwardly of each side wall 5 and is circular in fornrso as to pivotally receive the inner end of pins 20 on arms 2 therein, and support reflector 26 for pivotal rotation with relation to arms 2. Recess 22 terminates short of'the inner surface of its respective side wall 5, and in order that conductors 18 may be located within the assembled luminaire, an opening 7 is provided which extends, outwardly from the inner surface of one of the side walls 5 to join its recess 22 to the inner portion of the assembled luminaire. Opening 7 is smaller than recess 22 so that shoulders are provided to limit the inward travel of the pin 20 on the arm 2'. Inasmuch as flangeportions 62 of reflector 26, as previously described, extend over the side of lens ring 24 to a position ad jacent the lower edge of ring 24, an opening 9 of anysuitable shape is provided in flange portion 62 to permit pins 20 to extend freely therethrough.

As shown in Figs. 1 and 6, the upper portion of the side wall 5 having opening 7 therein is provided with anintegral L-shaped flange 11 which has one of its arms extending inwardly toward the center of reflector 26 and its other arm extending upwardly therein. Flange 11 may be of any suitable size or shape to provide a support for a lamp socket 13 which, in turn, may be of any suitable type, such as one having an internal socket portion, not shown, for receiving the screw base, not shown, of the lamp l6. Socket 13 may be secured to flange 11 in any suitable manner, such as a machine screw and nut assembly, not shown, extending through each of these parts. Lamp 16 may be of any suitable type. which is desirable for flood-lighting purposes of either the incandescent or gaseous discharge type of either high or low pressure. In order that electrical connections may be made to lamp 16, conductors 1t, extend through an opening (not shown) in the inwardly extending leg, of flange 1i and engage suitable terminal means, not shown, on socket 13. it is to be realized that the dimensions of the socket 1'3 and lamp 16 will be known for a particular design and accordingly, the flange ll will be designed so as to extend in a manner to properly support the lamp 16 with relation to the It is also believed. obvious that flange 11 may be formed separately from the lens ring 24 and secured thereto in any suitable manner. Flange l1 and socket 13 may be of any suitabie material, such as an aluminum alloy, and a ceramic material, respectively. As shown, only one flange 1-1 is required to support lamp l6 and accordingly opening 7 in side wall 5 need only be provided in the side wall 5 adjacent the flange ii. If desired, however, an opening 7 could be provided in each side wall 5.

The upper portion of each side wall 5 is also provided with an integral outwardly extending irregular shaped support 15 which has its lower edge located somewhat above the horizontal center of pins 20. The outer side of support 15 is approximately in the same vertical plane as the outer end of flange 35. The lower surface of each support 15 is provided with a circular curved portion 17 which extends upwardly therein and is of a configuration so as to be cooperable with the upper circular surface of pins 2%. inasmuch as the assembled luminaire is supported from below, the curved surfaces 17 on supports 15 increase the bearing area which is in engagement with the pins 2%) so as to reduce the unit bearing load on pins 29 and thereby increase the stability of the luminaire. Each support 15 also extend outwardly from the pin 2t) to one side a suflicient distance so as to form a boss portion 19 which is provided with a threaded opening 21 extending vertically therein.

in accordance with the principles of our invention, the portion of ring flange 36 which is located below each of the pins 2% is formed with a downwardly ex tending arcuately shaped section 23, the lower edge of which may be located in alignment with the lower edge of the inner projection 3%. By so providing sections 23,

an arcuate channel 25 is formed between the upper surface'of each section 23 and the lower surface of each pin 20. An integral boss 27 is also provided adjacent each pin 20 which extends-upwardly from ring flange 36 and outwardly from side wall and which is located on the side of pin 20 opposite from that on which the threaded opening 21 in boss 19 is located. In order to extend channel 25, the surface of each boss 27 adjacent pin 20 is curved so as to be spaced the same distance from the outer surface of pin 20 as is section 23 and is joined therewith. Each boss '27 is also provided with a horizontally extending threaded opening 29 which has its open end opposite from the surface forming a part of channel 25. Further, a pair of irregularly shaped clamp and stop members 31 are provided for controlling the relative position of the luminaire assembly and the supporting arms 2, each of which comprises a vertically extending portion 33 located so as to extend over the threaded openings 29 in the bosses 27 and which are provided with openings, not shown, in alignment with openings 29 whereby members 31 may be permanently secured to the bosses 27 by any suitable means, such as machine screws 50 extending through said aligned openings and threadedly engaging openings '29. Each member 31 is also provided with an integral portion 101 which is located so as to extend over the top surface of its boss 27, and which also extends horizontally toward the adjacent pin 20 slightly below the center thereof and which terminates short thereof. Thereafter each member 31 is formed with a downwardly extending semicircular segment portion 37 which extends around the lower surface of its cooperable pin 20 to a point approximately opposite from portion 101. Each member 31 is then provided with a horizontally extending portion 38 which extends below and is spaced from the threaded openings 21 in bosses 19 of supports 15. In order to adjustably secure members 31 to supports 15, an opening is provided in portions 38 in alignment with openings 21 whereby portions 38 of members 31 may be biased toward supports 15 by any suitable means, such as machine screws 102 extending therethrough and threadedly engaging the threaded openings 21. Thus, the bearing pressure between each segment 37 of member 31 and its cooperable pin 20 of arm 2 may be varied by changing the pressure which is exerted by the machine screws 102.

As more clearly shown in Fig. 6, each segment 37 is provided with a slot 41 which extends between portions 101 and 38 of members 31 and which is located approximately centrally of segments 37. Each pin 20 is provided with a radially outwardly extending pin 43 which is located within slot 41 and is of a size and configuration so as to be movable within the slot and engageable with the ends thereof. Pins 43 and members 31 may be of any suitable material having suflicient structural strength to accomplish the above indicated purposes, such as an aluminum alloy. Further, each pin 43'may be secured to each pin 20 in any suitable manner, such as by being wedged in an opening therein or by threadedly engaging an opening therein. Further, in order to provide ready access, an opening 45 is provided in flange 36 below the machine screws 102 in supports 15. 7

As indicated, the assembled luminaire bears against the upper surface of pins 20 and, accordingly, by properly locating machine screws 102 in openings 21 of sup ports 15, the segments 37 of members 31 clamp the pins 20 between the upper surface of the segments 37 and the lower surfaces 17 of supports 15 so as to prevent any relative rotational movement therebetween. At any time, however, such relative angular position may easily be adjusted by merely loosening machine screws 102 and rotating the luminaire and thereafter again tightening the machine screws 102. Such relative position can be varied .to any point between the points ofengagement of the 10 vious, however, that the engagement of pins 43 with the opposite ends of the slots 41 will prevent the lumi naire assembly from being rotated to any further degree in either direction dependent upon which end of the slots 41 of the pins 43 engage. Such a structure is quite desirable as it prevents a luminaire from being completely rotated and thereby causing the conductors 18 to be: twisted, which twisting could result in obtaining an elec-- trical short-circuit between the conductors 18 and the luminaire assembly. It is, of course, obvious that pinsv 43 must be in alignment with each other so as to simul-- taneously engage ends of slots 41. However, if desired only one clamping member 31 and cooperable pin 43 need be provided on only one arm 2.

Thus, it will bev noted that we have provided a new and improved luminaire of the type described which may easily be serviced and installed as only a screw driver is necessary to assemble or obtain the release of the various parts. Also, as the flange portion 62 of reflector 26 extends downwardly over the sides of the lens ring 24, the supporting mechanism is substantially enclosed by flange 62 so that a simplified symmetrical appearance of the luminaire is obtained. Further, the unique construction of the pinless hinge also permits maintenance of the luminaire to be readily accomplished.

Fig. 2 illustrated another modification of our invention which comprises an elongated circular tank assembly 8' which is mounted by means of a suitable fitting 10 so as to extend horizontally across the top of a support pipe (not shown). Fitting 10 may be secured to tank 8' in any suitable manner, such as by machine screw and nut assembly 103, extending through aligned openings therein. A circular dish-shaped index plate 104 is located at each end of the tank 8', only one of which is shown, with a flange extending partially inwardly of the side Wall of tank 8 and secured thereto in any suitable manner, such as by machine screws (not shown) extending through aligned openings therein. In order to provide sufiicient rigidity for such an assembly, a separate support 105 is provided within tank 8 which extends along the inner lower surface and which has a diametrically upwardly extending arm 106 at each of its ends each of which is secured at its free end to the upper side of tank 8' in any suitable means, such as by a machine screw and nut assembly 107 extending through aligned openings therein. The lower ends of arms 2' are provided with enlarged circular dish-shaped portions 116 which are of a size so that their inner surface is adapted to engage the outer surface of the flange of plate 104 extending outwardly of tank 8 so that the arms 2 may be rotated thereabout. In order to provide a pivot point for dish-shaped portions 116, they are provided with a central clearance opening 108 through which a suitable machine bolt 109 extends and threadedly engages a threaded opening v112 located centrally in plate 104 behind clearance opening 108. In order to provide definite relative positioning means between each plate 104 and dish-shaped portions 116, the latter is provided with a machine screw 110 which is radially spaced outwardly from bolt 109. As shown in Fig. 11, each plate 104 is provided with a plurality of radially spaced openings lll'in its plate portion for receiving the inner portion of screw .110. Thus, the relative positions between each .end of the screw enters the desired opening 111 in the plate 104. Plate 104 is also provided with an enlarged opening 114 which is offset from its center so that the conductors 18, not shown, as previously described may 75; pass therethrough to the arm 2'. Thereafter, in order to secure the assembly, the bolts 109 are threaded inwardly in openings 112 to clamp the arms 2' against plates 104. If desired, the heads of bolts 109 may be provided with a slot whereby the entire adjustment may be accomplished by merely using a screw driver. Inasmuch as the upper portions of arms 2, the reflector 26, lens ring 24 and lens 32 are identical in construction to that previously described, such constructional details need not be repeated and accordingly, like reference numerals have been utilized to identify like parts. By such construction it will be noted that we have provided a luminaire which may easily have its supporting arms rotated to any angular position so that the entire light output may be directed downwardly to the ground without causing any substantial interference therewith by the support pipe.

Having described preferred embodiments of our invention, it is desired that the invention be not limited to the particular forms specifically illustrated and described herein, as it will be readily apparent to persons skilled in the art that various changes and modifications may be made in the particular structures shown without departing from the broad spirit and scope of our invention. Accordingly, it is desired that our invention be given a broad scope and that it be limited only as required by the prior art.

We claim as our invention:

1. A luminaire comprising, a support member having a central opening therein, lampholding means secured to said support member adapted to support a lamp so that light rays therefrom will pass through said central opening, a dish-shaped reflector having a peripheral flange freely engageable with one side of said support member so as to be supported freely thereon over said opening,

at least a portion of said reflector having a skirt onsaid flange located outwardly of said support member and extending adjacent to and over the adjacent edge portion thereof, a pivot hanger secured to said skirt having an arcuately shaped portion extending outwardly thereof, a pivot holder secured to said support member having another arcuately shaped portion extending outwardly thereof and located to engage said first mentioned arcuately shaped portion and being formed with an interfitting curvature so that said reflector may be rotated with respect to said support member about said engaged arcuate portions.

2. A luminaire comprising, a support member having a central opening therein, lampholding means secured to said support member adapted to support a lamp so that light rays therefrom will pass through said central opening, a dish-shaped reflector having a peripheral flange freely engaging one side of said support member so as to be supported freely thereon, at least a portion of said reflector having a skirt on said flange located outwardly of said support member and extending adjacent to at least an edge portion thereof, a pivot hanger secured to said flange having an arcuately shaped portion extending outwardly of said skirt, a pivot holder secured to said support member having another arcuately shaped portion with a curvature of less than 360 degrees which is located with its inner surface engaging the outer surface of said firstrnentioned arcuately shaped portion, said inner and outer surfaces on said arcuately shaped portions having interfitting curvatures so that said reflector may be rotated with respect to said support member about said engaged arcuate portions,

3. A luminaire comprising, a substantially ring-shaped support having a central opening therein, lampholding means secured to said support to support a lamp so that light rays therefrom will pass through said central opening, spaced supporting arms located adjacent diametrically opposed sides of said support, respectively, said arms and said support having laterally extending diametrically opposed pivotally engaging means so that said support is pivotally supported between said arms, a dish-shaped reflector having an outwardly extending rim portion engaging one side of said support, an integral flange portion extending transversely from said rim portion and over the outer edge of said support and located between said arms and said pivotally engaging means, respectively, so as to enclose said pivotally engaging means, and said flange having open-ended slots therein through which one of said pivotally engaging means extends.

4. A luminaire comprising, a substantially ring-shaped support having a central opening therein, lampholding means secured to said support to support a lamp so that ii ght rays therefrom will pass through said central opening, spaced arms located adjacent diametrically opposed portions of said support, respectively, said support having diametrically opposed pivot supporting means recessed inwardly from opposed sides of said support, said arms having inwardly extending pivot pins, respectively, engageable with said pivot supporting means to pivotally support said support between said arms, a dish-shaped reflector having a rim portion engaging one side of said support and extending outwardly over the corresponding side of said recesses, integral flange portions extending transversely from said rim portion said flange portion covering the outer edge of said support and being spaced outwardly from the outer open side of said recesses to enclose said pivot support, said flange portion having slots therein for receiving said pivot pins, and clamping means located in at least one of said recesses releasably engageable with one of said pivot pins and secured to said support for preventing rotational movement between said support and said arms.

5. A luminaire comprising, an elongated tank assembly having at least one hollow arm extending outwardly therefrom and communicating therewith, electrical control means located within said tank assembly, said arm having a hollow support member spaced outwardly from said tank assembly, a supporting ring having a side opening pivotally receiving said hollow support member, lampholding means secured to said supporting ring so that a lamp may extend inwardly thereof, said supporting ring having an inwardly extending flange at one side thereof so as to define a smaller central opening, a refractor having the same shape as said central opening but of a slightly smaller size so as to be supported within said ring by said flange, a dish-shaped reflector pivotally secured to the other side of said ring releasable clamping means engageable with said ring and support member for preventing movement therebetween, and flexible electrical conducting means extending through said side opening of said ring and through said arm and its support member thereon and into said tank assembly for electrically connecting said lampholding means to said electrical control means.

6. A luminaire comprising, a support ring, a transparent closure secured to said ring over one side thereof, a reflector cover secured to said ring over the opposite side thereof, lampholding means supported on said ring for supporting a lamp in the space between said reflector cover and said transparent closure, supporting means engaging said ring from the exterior for supporting the luminaire comprising a supporting pivot arm, and means on the outer edge of said ring for rotatably receiving said pivot arm including releasable clamping means engaging said arm for preventing pivotal movement of the luminaire thereon at any selected angular position.

7. A luminaire comprising, a support ring, a transparent closure secured to said ring over one side thereof. a reflector cover secured to said ring over the opposite side thereof, lampholding means supported on said ring for supporting a lamp in the space between said reflector cover and said transparent ciosure, supporting means engaging said ring from the exterior for supporting the luminaire comprising a supporting pivot arm, means on "the outer edge of said ring for rotatably receiving said pivot arm including releasable clamping means engaging said arm for preventing pivotal movement of the luminaire thereon at any selected angular position, and 'a recess in the ring for rotatably receiving the outer end of said pivot arm.

8. A luminaire comprising, a support ring, a transparent closure secured to said ring over one side thereof, a reflector cover secured to said ring over the opposite side thereof, lampholding means supported on said ring for supporting a lamp in the space between said reflector cover and said transparent closure, supporting means engaging said ring from the exterior for supporting the luminaire comprising a supporting pivot arm, means on the outer edge of said ring for rotatably receiving said pivot arm including releasable clamping means engaging said arm for preventing pivotal movement of the luminaire thereon at any selected angular position, a recess in the ring for rotatably receiving the outer end of said pivot arm, said pivot arm being hollow, and said recess having a relatively small opening at its inner end for the passage of electrical conductors extending through the pivot arm for connection to said lampholding means.

9. A luminaire comprising, a support ring, a transparent closure secured to said ring over one side thereof, a reflector cover secured to said ring over the opposite side thereof, lampholding means supported on said ring for supporting a lamp in the space between said reflector cover and said transparent closure, supporting means engaging said ring from the exterior for supporting the luminaire comprising a supporting pivot arm, means on the outer edge of said ring for rotatably receiving said pivot arm including releasable clamping means engaging said arm for preventing pivotal movement of the luminaire thereon at any selected angular position, and said clamping means and pivot arm having cooperating radial projection and recess means for positively limiting pivotal movement of the luminaire in opposite directions.

References Cited in the file of this patent UNITED STATES PATENTS 1,612,328 Townsend et al Dec. 28, 1926 1,647,053 Pfafiie Oct. 25, 1927 1,705,624 McMillan Mar. 19, 1929 1,844,651 Halvorson Feb. 9, 1932 1,952,783 Tamol Mar. 27, 1934 1,977,883 Levy Oct. 23, 1934 2,035,991 Sinclair Mar. 31, 1936 2,096,777 zAstorg Oct. 26, 1937 2,156,947 Johnson May 2, 1939 2,180,982 Foulds Nov. 21, 1939 2,226,300 Alexander Dec. 24, 1940 2,227,502 Johnson et al. Jan. 7, 1941 2,302,661 Benson Nov. 24, 1942 2,347,313 Dore Apr. 25, 1944 2,411,189 Brown Nov. 19, 1946 2,481,531 Philllips Sept. 13, 1949 2,494,058 Ries et al. Jan. 10, 1950 2,605,388 Theisen July 29, 1952 2,649,535 Feder Aug. 18, 1953 2,697,776 Walle Dec. 21, 1954 2,778,929 Loehr Jan. 22, 1957 2,791,681 Dunker et a1. May 7, 1957 

